Genetic Mapping and QTL Analysis for Disease Resistance Using F2 and F5 Generation-based Genetic Maps Derived from Tifrunner × GT-C20 in Peanut (Arachis hypogaea L.)

    Wang, H and Pandey, M K and Qiao, L and Qin, H and Culbreath, A K and He, G and Varshney, R K and Guo, B (2013) Genetic Mapping and QTL Analysis for Disease Resistance Using F2 and F5 Generation-based Genetic Maps Derived from Tifrunner × GT-C20 in Peanut (Arachis hypogaea L.). The Plant Genome. pp. 1-28. ISSN 1940-3372

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    Abstract

    One mapping population derived from Tifrunner × GT-C20 has shown great potential in developing high dense genetic map and identification of QTLs for important disease resistance, Tomato spotted wilt virus (TSWV) and leaf spot (LS). Both F2 and F5 generation- based genetic maps were constructed previously with 318 and 239 marker loci, respectively Higher map density could be achieved with the F2 map (5.3 cM/locus) as compared to the F5 (5.7 cM/locus). QTL analysis using multi-environment phenotyping data from F8 and higher generation for disease resistance identified 54 QTLs in the F2 map including two QTLs for thrips (12.14 – 19.43% PVE), 15 for TSWV (4.40–34.92% PVE) and 37 for LS (6.61– 27.35% PVE). Twenty-three QTLs could be identified in F5 map including one QTL for thrips (5.86% PVE), nine for TSWV (5.20 – 14.14% PVE) and 13 for LS (5.95–21.45% PVE). Consistent QTLs identified in each map have shown higher phenotypic variance than non-consistent QTLs. As expected, the number of QTLs and their estimates of phenotypic variance were lower in the F5 map. This is the first QTL study reporting novel QTLs for thrips, TSWV and LS in peanut, and thus, future studies will be conducted to refine these thrips, TSWV and LS in peanut, and thus, future studies will be conducted to refine these

    Item Type: Article
    Divisions: UNSPECIFIED
    CRP: UNSPECIFIED
    Subjects: Mandate crops > Groundnut
    Others > Genetics and Genomics
    Depositing User: Mr Sanat Kumar Behera
    Date Deposited: 25 Aug 2013 08:54
    Last Modified: 16 Sep 2013 06:13
    URI: http://oar.icrisat.org/id/eprint/7065
    Official URL: http://dx.doi.org/10.3835/plantgenome2013.05.0018
    Projects: UNSPECIFIED
    Funders: USDA Agricultural Research Service, Georgia 418 Agricultural Commodity Commission for Peanuts, Peanut Foundation-Georgia, National Peanut Board-Georgia, National Science Foundation (NSF), USA
    Acknowledgement: We thank Billy Wilson, Jake Fountain, Stephanie Lee, Lucero Gutierrez and Sara Beth Pelham for technical assistance in the field and the laboratory. This research was partially supported by funds provided by the USDA Agricultural Research Service, the Georgia Agricultural Commodity Commission for Peanuts, Peanut Foundation and National Peanut Board. We are also thankful to National Science Foundation to DRC (NSF, DBI-0605251) and USDA/CSREES/Capacity Building Program to GH (#2006-38814-17489) for supporting this research. Mention of trade names or commercial products in this publication is solely for the purpose of providing specific information and does not imply recommendation or endorsement by the U.S. Department of Agriculture.
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